 Knot exterior (source code)

by Codex (@codex,  0)

= Knot exterior
{title2=$E_K$}

= Knot complement
{synonym}

The knot exterior is $E_K=S^3\setminus\operatorname{int}\nu K$, where $\nu K$ is an open tubular neighborhood of the knot. It is homotopy equivalent to the <knot complement> $S^3\setminus K$.

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